Patent US4741964A successfully refreshed from Google Patents.
US4741964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structure containing hydrogenated amorphous silicon and process
Assignee: International Business Machines Corp
•
Filing: 1986-07-17
•
Granted: 1988-05-03
•
Expires: 2006-07-17
Abstract
Abstract A structure containing a substrate having a first hydrogenated amorphous silicon layer thereon and a second hydrogenated amorphous silicon layer located above the first layer. The two hydrogenated amorphous silicon layers differ from each other in the concentration of hydrogen contained therein. In addition, a process for fabricating such a structure is provided.
Inventors
- 👤 Ivan Haller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:52
CPC Classifications
H; H10; H10D; H10D30/00; H10D30/60; H10D30/67; H10D30/6704; H10D30/6713; H10D30/6729; H10D30/673; H10D30/6732; H10D30/674; H10D30/6741; H10D30/6743; H10D30/6746; H10P; H10P14/00; H10P14/20; H10P14/24; H10P14/29; H10P14/2901; H10P14/32; H10P14/3202; H10P14/3204; H10P14/3211; H10P14/34; H10P14/3402; H10P14/3404; H10P14/3411
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
89 words
A structure comprising: a substrate suitable for use in semiconductor devices having at least one major surface area; a first layer of hydrogenated amorphous silicon adjacent said major surface area wherein said first layer has a first concentration of hydrogen incorporated therein; a second layer of hydrogenated amorphous silicon adjacent said first layer and having a second concentration of hydrogen incorporated therein that differs from said first concentration and wherein the layer having the higher hydrogen concentration is patterned and the layer having the lower concentration is not patterned.
Claim 2
Dependent Claim
89 words
A structure comprising: a substrate suitable for use in semiconductor devices having at least one major surface area; a first layer of hydrogenated amorphous silicon adjacent said major surface area wherein said first layer has a first concentration of hydrogen incorporated therein; a second layer of hydrogenated amorphous silicon adjacent said first layer and having a second concentration of hydrogen incorporated therein that differs from said first concentration and wherein the layer having the higher hydrogen concentration is patterned and the layer having the lower concentration is not patterned.
Claim 3
Dependent Claim
18 words
The structure of claim 1 wherein said second layer has a higher hydrogen concentration than said first layer.
Claim 4
Dependent Claim
15 words
The structure of claim 20 wherein the layer having the higher hydrogen concentration is doped.
Claim 5
Dependent Claim
21 words
The structure of claim 1 wherein said substrate is selected from the group of glass, sapphire, silicon, metal, and metallized substrates.
Claim 6
Dependent Claim
15 words
The structure of claim 2 wherein said second layer is thicker than said first layer.
Claim 7
Dependent Claim
33 words
The structure of claim 5 wherein the thickness of said first layer is about 100 to about 1000 angstroms and the thickness of said second layer is about 100 to about 1000 angstroms.
Claim 8
Dependent Claim
15 words
The structure of claim 1, wherein said second layer is thicker than said first layer.
References Cited (Backward Citations)
JPS5345974A
Cited
JPS5372473A
Cited
JPS55146934A
Cited
US4363828A
Cited
US4285762A
Cited
US4540647A
Cited
US4624737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-03 | 1991-11-02 | 1992-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-03 | 1995-11-02 | 1996-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-03 | 1999-11-02 | 2000-05-03 | $7700.00 | Window Closed / Lapsed |